Hinge base



FIG. 1 is a front elevational view of a hinge base incorporating my new design;

FIG. 2 is a side elevational view taken from the left of FIG. 1;

FIG. 3 is a bottom plan view;

FIG. 4 is an enlarged fragmentary sectional view taken along the line 4--4 in FIG. 1.

FIG. 5 is an enlarged fragmentary sectional view taken along the line 5--5 in FIG. 1. 

The ornamental design for a hinge base, as shown. 